The role of static stress diffusion in the spatio-temporal organization of aftershocks (bibtex)
by LIPPIELLO Eugenio, DE ARCANGELIS Lucilla, GODANO Cataldo
Abstract:
We investigate the spatial distribution of aftershocks, and we find that aftershock linear density exhibits a maximum that depends on the main shock magnitude, followed by a power law decay. The exponent controlling the asymptotic decay and the fractal dimensionality of epicenters clearly indicate triggering by static stress. The nonmonotonic behavior of the linear density and its dependence on the main shock magnitude can be interpreted in terms of diffusion of static stress. This is supported by the power law growth with exponent H≃0.5 of the average main-aftershock distance. Implementing static stress diffusion within a stochastic model for aftershock occurrence, we are able to reproduce aftershock linear density spatial decay, its dependence on the main shock magnitude, and its evolution in time.
Reference:
The role of static stress diffusion in the spatio-temporal organization of aftershocks (LIPPIELLO Eugenio, DE ARCANGELIS Lucilla, GODANO Cataldo), In PHYSICAL REVIEW LETTERS, volume 103, 2009. (Articolo in rivista)
Bibtex Entry:
@article{lip09,
author = {LIPPIELLO Eugenio, and DE ARCANGELIS Lucilla, and GODANO Cataldo,},
pages = {38501-38501},
title = {The role of static stress diffusion in the spatio-temporal organization of aftershocks},
volume = {103},
note = {Articolo in rivista},
issn = {0031-9007},
journal = {PHYSICAL REVIEW LETTERS},
doi = {10.1103/PhysRevLett.103.038501},
year = {2009},
wosId = {WOS:000268088300071},
scopusId = {2-s2.0-68649116054},
abstract = {We investigate the spatial distribution of aftershocks, and we find that aftershock linear density exhibits a maximum that depends on the main shock magnitude, followed by a power law decay. The exponent controlling the asymptotic decay and the fractal dimensionality of epicenters clearly indicate triggering by static stress. The nonmonotonic behavior of the linear density and its dependence on the main shock magnitude can be interpreted in terms of diffusion of static stress. This is supported by the power law growth with exponent H≃0.5 of the average main-aftershock distance. Implementing static stress diffusion within a stochastic model for aftershock occurrence, we are able to reproduce aftershock linear density spatial decay, its dependence on the main shock magnitude, and its evolution in time.}
}
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